# Management systems, product approvals and laboratory. - Page: https://www.songtian-ste.com/en/quality/ - Chinese version: https://www.songtian-ste.com/zh/quality/ Quality, approvals & laboratory Management-system certificates, CNAS and UL laboratory programs, the test capability matrix and environmental compliance. Management systems ## Certified management systems. Scope and validity are stated on each certificate. Some certificates were issued under the company’s former name. Select a certificate to view the full-size image. [Open full-size certificate](https://www.songtian-ste.com/assets/quality/originals/iatf16949.jpg) **IATF 16949** ### Automotive quality management system Design and manufacture of ceramic capacitors, varistors, thermistors and film capacitors. - **Issued by**: Bureau Veritas Certification - **Certificate validity**: 21 Jan 2025 – 20 Jan 2028 IATF certificate no. 0563214 · Page 1 of 2 [Open full-size certificate](https://www.songtian-ste.com/assets/quality/originals/iso45001.png) **ISO 45001:2018** ### Occupational health and safety management system Design, development and production of ceramic capacitors, varistors, thermistors and film capacitors, and related management activities. - **Issued by**: China Quality Certification Centre (CQC) - **Certificate validity**: 9 Jan 2024 – 8 Jan 2027 Also certified to GB/T 45001-2020 [Open full-size certificate](https://www.songtian-ste.com/assets/quality/originals/iso14001.png) **ISO 14001:2015** ### Environmental management system Design, development and production of ceramic capacitors, varistors, thermistors and film capacitors, and related management activities. - **Issued by**: China Quality Certification Centre (CQC) - **Certificate validity**: 9 Jan 2024 – 13 Jan 2027 Also certified to GB/T 24001-2016 [Open full-size certificate](https://www.songtian-ste.com/assets/quality/originals/iso9001.jpg) **ISO 9001:2015** ### Quality management system Design, development and production of ceramic capacitors, varistors, thermistors and film capacitors. - **Issued by**: China Quality Certification Centre (CQC) - **Certificate validity**: 13 Jan 2025 – 19 Feb 2028 Also certified to GB/T 19001-2016 · Amended 23 Jan 2026 Laboratories ## UL witnessed testing. CNAS accreditation. Testing support from product development through incoming and finished-product inspection. UL WTDP · 701335-001 ### UL Witnessed Test Data Program laboratory STE joined the UL Witnessed Test Data Program (WTDP) in 2013–2014 for UL 1449 (varistors) and UL 60384-14 (safety capacitors), under laboratory no. 701335-001. Under this program, testing takes place at STE’s laboratory and is witnessed by UL staff. The two Certificates of Achievement below record UL’s acceptance of test data for the named projects. They retain the standard editions, project numbers and test dates shown on the certificates. [Open full-size certificate](https://www.songtian-ste.com/assets/quality/originals/ul-wtdp-1449.png) **UL 1449 Surge Protective Devices · 4th edition** Project 4789505630 · Tested 22 Sep 2020 [Open full-size certificate](https://www.songtian-ste.com/assets/quality/originals/ul-wtdp-60384.png) **UL 60384-14 / CSA E60384-1:14 / CSA E60384-14** Project 4789725569 · Tested 4 Dec 2020 CNAS L24638 ### CNAS-accredited testing center The testing center of Guangdong Songtian Electronic Industrial Co., Ltd. is accredited by the China National Accreditation Service for Conformity Assessment (CNAS) to ISO/IEC 17025:2017 (CNAS-CL01), registration no. L24638. The certificate is valid from 19 March 2026 to 25 November 2031. CNAS assesses laboratory competence against internationally recognized criteria. Its assessment covers personnel, equipment, environmental conditions, test methods, sample handling, quality management, measurement traceability and the accuracy of results. The center supports testing of ceramic capacitors, film capacitors, varistors and thermistors for product development, incoming-material inspection, finished-product inspection and customer quality requirements. CNAS participates in the ILAC and APAC mutual recognition arrangements. The accredited scope is defined in the annex to certificate CNAS L24638. Acceptance of a test report depends on its scope, the applicable arrangements and the recipient’s requirements. [Open full-size certificate](https://www.songtian-ste.com/assets/quality/originals/cnas-l24638.png) **CNAS L24638 laboratory accreditation certificate** ISO/IEC 17025:2017 · 19 Mar 2026 – 25 Nov 2031 Test capability matrix ## Electrical, mechanical, climatic and compliance tests for safety capacitors, ceramic and film capacitors, varistors and NTC thermistors. Test methods and criteria follow the applicable product standards and datasheets. | | Test item | Safety X2 | Safety Y1 | Safety Y2 | Ceramic capacitor | Film capacitor | Varistor | NTC thermistor | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Electrical | Capacitance | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Dissipation factor | ✓ | ✓ | ✓ | ✓ | ✓ | | | | | Withstand voltage | ✓ | ✓ | ✓ | ✓ | ✓ | | | | | Insulation resistance | ✓ | ✓ | ✓ | ✓ | ✓ | | | | | Impulse voltage | ✓ | ✓ | ✓ | | | | | | | Charge and discharge | ✓ | ✓ | ✓ | | | | | | | Varistor voltage | | | | | | ✓ | | | | DC leakage current | | | | | | ✓ | | | | Clamping voltage | | | | | | ✓ | | | | Impulse current | | | | | | ✓ | | | | Maximum peak current | | | | | | ✓ | | | | Surge | | | | | | ✓ | | | | Nominal discharge current | | | | | | ✓ | | | | Solderability | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Resistance to soldering heat | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Endurance | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Ripple current | ✓ | | | | ✓ | | | | | Resistance | | | | | | | ✓ | | | Endurance at continuous maximum current | | | | | | | ✓ | | | Endurance at cycled maximum current | | | | | | | ✓ | | | Mechanical | Robustness of terminations (tensile) | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | Robustness of terminations (bending) | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Climatic | Damp heat, steady state | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | Damp heat with load | | ✓ | ✓ | ✓ | | ✓ | ✓ | | | Dry heat | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Cold | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Temperature characteristics | | ✓ | ✓ | ✓ | | | | | | Temperature coefficient | | | | | | ✓ | | | | Rapid change of temperature | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | | Passive flammability | ✓ | ✓ | ✓ | | | ✓ | | | | Active flammability | ✓ | | ✓ | | | | | | | Environmental compliance | RoHS | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | Halogens | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | [Ask about testing](https://www.songtian-ste.com/en/contact/) Environmental compliance ## RoHS, halogens and conflict minerals. RoHS and halogen tests are run in the in-house laboratory. RoHS and REACH SVHC declarations and the conflict-minerals policy are available on request. **RoHS** RoHS tests for every product family in the matrix above. **Halogens** Halogen tests for every product family in the matrix above. **Conflict minerals** STE’s policy prohibits purchasing conflict metals from conflict regions. Suppliers must make a written commitment and pass the requirement upstream. [Request compliance declarations](https://www.songtian-ste.com/en/contact/?topic=compliance) [Social responsibility policy](https://www.songtian-ste.com/en/company/#responsibility) Product approvals ## Product approvals by series, with certificate numbers. UL **UL** UL recognition for selected series; laboratory in the UL Witnessed Test Data Program for UL 1449 and UL 60384-14 VDE **VDE** VDE certificates for selected series ENEC **ENEC** ENEC certificates for selected series CQC **CQC** CQC certificates for selected series Approval documents ## Certificates and datasheets are on each series page. **Series documents** Every series page lists its datasheets and approval certificates. **Part number search** Search by STE part number to find its datasheet and certificates. **Engineering support** For certificate copies or test reports, contact our application engineers.